LIMNESIA.—BDELLA. 15 
Body ovoid, almost globoid, high, transparent; yellowish-white, with six black spots 
on the back, these being widely separated by a broad longitudinal yellow stripe which at 
its frontal and anal end and again in its middle is itself crossed by a transverse blackish 
stripe, the spots placed thus—two large ones on the anterior half of the dorsum and 
two others on the posterior half, the latter separated from the former by a white 
interspace, and on each side at a little distance from the anterior ones is a small 
one nearer to the margin. Legs of moderate size, rather short, gradually longer 
from the first to the fourth pair; all bearing many spines and swimming-bristles, which 
are most numerous on the lower surface of the fourth pair; on the latter beneath 
there is also a row of short, erect spines on the third, fourth, and fifth joints, together 
with tufts of long swimming-hairs. Palpi rather short, their fourth joint bearing 
an oblique tooth. Mandibles with a narrow, falciform, non-denticulated claw. 
Genital plates united into a single large pentagonal piece, which only in its anterior half 
bears a lanceolate fissure ; three large stigmata present on each side of the genital piece. 
Lives in ponds in the vicinity of the city of Guatemala. 
Fam. BDELLIDA. 
[Kramer, Grundziige zur Systematik der Milben, in Archiv fiir Naturg. xliii. p. 244 (1877).} 
BDELLA. 
Bdella, Latreille, Gen. Crust. et Insect. 1. p. 153 (1806). 
1. Bdella splendida, sp. n. (Tab. III. figg. 2-2 c.) 
Corpus oblongum, leve ; parte antica magna, trigona, in rostrum longum acutum porrectum desinens; humeri 
rotundati, post eos corpus paullo angustius, usque ad apicem analem gradatim attenuatum ; postice late 
rotundatum ; colore ex fusco rubro. Rostrum ad basin paullulum inflatum, ad apicem subtus piligerum, 
setule dimidio paullulum separate, divergentes. Palpiquam rostrum longiores, setis sparsis brevibus armati; 
ad apicem quinti articuli valde elongati setas duas inequales ferentes, internam breviorem, externam 
longiorem. Extremus palporum articulus secundo brevior, tertius atque quartus brevissimi. Mandibule 
elongate, ad basin latiores, apicem versus gradatim gracilescentes, chelis minimis instructa; chelarum 
dens fixus curvus, acutus; dens mobilis latus, apice truncatus. Pars antica corporis (pseudo-cephalo- 
thorax), pedes et palpi coccinei; pars postica (abdomen) ex fusco rubra, stria lata rosacea at lineis tribus 
transversis angustis insequidistantibus ejusdem coloris induta. Cuticula mollis, subtilissime striatula, in 
dorso setas sparsas in series longitudinales dispositas gerens. 
Long. 1°25 millim. 
Hab. GUATEMALA, near the city (Stol/). 
Body oblong, smooth, gradually narrower from the rounded shoulders towards the 
anal end, the latter broadly rounded ; pseudo-cephalothorax triangular, ending in a 
long, acute rostrum. The pseudo-cephalothorax, rostrum, palpi, and legs are vivid 
scarlet; the rest of the dorsal surface from behind the eyes to the anus reddish-brown 
with darker spots, the latter varying with and depending on the intestinal contents; a 
